Fuel burner



Sept. 23, 1930. y R. F.. LEEFELD FUEL BURNER Filed; Apr'l- 3, 1928 INVENTOR.

" ATTORNEYS.

Patented Sept. 23, 1939 4narran Vs'ra'ras Para-Nr omer;

REFUS F. LEEFELD, F LOS ANGELES, CALIFORNIA; SECURITY-FIRST NATIONAL BANK OF LOS ANGELES, EXECUTOR OF SAID RUFUS F. LEEFELD, DECEASED, ASSIGNOR T0 PEABODY ENGINEERING CORPORATION, OF NEW YORK, N. Y., A CORPORATION OI' A NEW YORK FUEL BURNER Applicationnled April 3, 1928. Serial 110.2674130.

My invention relates to fuel burners and more particularly to that verized coal-has been admitted and from .4 which it has been discharged through a plu- J bolts and cap nuts 8 to rality of openings or through a continuous annular slot.

According tothe present inventionthe fuel box is made up of a plurality of independent and non-communicating sections to which the fuel is delivered from a manifold through independent connections. The invention will be understood by reference to the accompanying drawin sin which Fig. 1 is a longitudinal section on t e plane of the line 1,-1 of Fig. 2; Fig. 2 a front view on a small'er'scale than that of Fig. 1; and Fig. 3 a detail section. on the plane of the line 3-3, Fig. 2. Similar reference numerals indicate similar parts in.

the several views.

Referring to the drawings, the numeral 1 designates a portion of a furnace wall 'and 2 the furnace front plate. An opening 3 in the wall 1 constitutes the. throat ofthe fur-v nace. Asshown', the throat vis frusto conical wi-th its smaller end at the entrance.

The present construction comprises a manifold 4 in the form of a sector of a circle in vertical section having two fuel inlet connections 5, to which may be coupled pipes leading from a source 'of supply. The manifold is secured to the front plate 2 by bolts 6.l

Arranged concentrically 4with the manifoldv v 4 is a fuel box, constituting the burner proper, made up of a plurality of independent similar sections 7, three being shown. These are secured together, and to form an annulus, the inner wall 9 of which is frusto conical" with its smaller end at the entrance to the furnace throat. Each of the fuel box sections has a radial extension 10 of suchform and len th as to embrace the manifold 4. Each extension has an opening 11 in its inner wall which' registers with an o ening 12 in the abutting wall of the mani old, as shown in Fig. 3.

type comprising. a' box or ring adapted to be secured to a furnace the front plate 2, by'

There is thus provided an independentlpassage for the fuel from` the manifold to each of the sections of the fuel box or ring. The

latter is secured to the manifold by bolts 13 and cap nuts 14.

-The sections 7 are preferably iron castins and in the wall 9 of each section is forme a series of holes 15, the walls of which are inclined at an angle of axis of the box. When the several sections are assembled, there is formed a substantially continuous discharge outlet, the fuel issuing through the holes 15 in jets, the jets forming a converging cone. Instead of holes, the inf ner walls 9 of each of the sections may be formed with a slot vso that there will be provided a substantially continuous annular outlet for the fuel.

Each section .7 is also formed with a flan 1d to which are secured, by bolts 17, abutting lian-ged plates 18. These plates `when assembled f orm a continuous lining' for a ortign of the inner wall 9 of the fuel box an males substantially to the a simple and easily adjusted lit between the sections 7 and the frusto conical back plate 19, a portion-of which only is shown in Fi 1,

in .S.

the sections 7. Thesei sections are the only parts which require replacement. This is an advantage as it is vcheaper to replace a part ratherthan an entire integral ring.

In operation the fuel is delivered to the manifold through the openings 5 5, and w from the manifold flows through the several extensions 10 to the' corresponding section 7,

a and discharged therefrom -through either holes or slots in a thin stream in the form of a converging cone.- The fueland air for combustion are mingled at substantially the entrance to the throat 3 and, as the fuel is pro-1 jected into the air from a source outside of and surrounding the air, there results the100 7 can be necessary turbulence to effect complete combustion of the fuel.

While I have shown only the actual parts of the burner as assembled and in relation to the furnace, it is to be understood that the burner may beused with natural draft or it may be fitted to a furnace using forced draft. I have not illustrated a wind -vbox nor air l register, through which the air for combustion passes and. is given a whirling motion by the setting ofthe register doors, as these features are well known and form no part of my inventiom Y 1. A fuel burner comprising a plurality ofv independent sections secured together, a manifold and means for delivering fuel thereto,

independent connections between said manifold and each of said sections, each of said sections having a flange, vand lates secured to said flanges and forming a ining for the inner wall of the burner. n

2. In combination, a furnace having a wall with an open'in therein 'constituting the throat of the comustion chamber, a manifold having a fuel inlet connection, means for securing said manifold to the furnace wall, a fuel burner comprising a pluralit of independent sections each having a discharge outet, means for securing said sections together in the form of an annulus to provide a free passage therethrough for air for combustion,

and connections between the manifold and each of said sections for supplying fuel to the latter. l

3. In combination, a furnace having a wa'Il with an opening therein constituting the throat of the combustion chamber, a manifold having a fuel inlet connection, means for securin said manifold to the furnace wall, a fue burner comprising a plurality of independent sections each having its inner wall inclined, means for securing said sections together in the form of an annulus to provide a a free passage therethrough for air-for combustion, said inner walls eing formed with fuel discharge openings, and connections between the manifold and each of said sections for supplying fuel to the latter.

4. In combmation a furnace having a wall with an opening therein constituting the fthroat of the combustion chamber, a manifold having a fuel inlet connection, means for securin said manifold to the furnace wall, a fuel urner comprlsmg a pluralit -of in-v 1,77e,7s5 y throat of the combustion chamber, a manifold having a fuel inlet connection, means for supporting said manifold in proximity tov said opening', a fuel burner comprising a plurality of independent sectionseach having a discharge outlet, means for securing-said sections together in the form of` an annulus to provide a free passage therethrough for air for combustion, and connections between the l walls being formed with fuel discharge openings, and connections between the manifold and each of said sections for lsupplying fuel to the latter.

Signed at Los-Angeles, in the county of Orange and State of California, this 9th day of `March, A. D. 1928.

, RUFUS F. LEEFELD.

dependent sections each having a discharge outlet, means for securing said sections together inthe form ofan annulus to provide a free passa e therethrough for air for comy with an opening t bustion, eac of said sections havin an extension to' embrace the mamfold an a passa therein to deliver fuel from the manifo d to the several box sections.

5. In combination a furnace having a wall herein constitutlng the 

